For PizzaGate, Sandy Hook, and his many numerous other acts of slander and incitement against private individuals, he's being sued up the wazoo. (These acts are torts, not crimes.)

For calling for Hillary's and Obama's assassination? The Secret Service investigated and determined that it would be too difficult to prosecute in the absence of someone actually taking Jones up on the offer. (If someone had, we wouldn't be having this discussion right now--he'd be serving life in a SuperMax for conspiracy.)